alleryThe IUPAC name of CH₃−CH₂−CH₂−CH₃ is
AButane
BPropane
CEthane
DMethane
Answer & Solution
Correct answer: A. Butane
1. Count the carbons in the main chain: C-C-C-C = 4 carbons.
2. Four-carbon alkane is called butane.
3. Its molecular formula is C₄H₁₀ (2×4 + 2 = 10 H).
4. Methane = 1 C, ethane = 2 C, propane = 3 C.
_Source: syllabus Science, Ch 4 "Carbon and its Compounds", §4.2.1_
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